Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b33cea3c0a9ba09…

MALICIOUS

PDF

37.2 KB Created: 2020-08-29 23:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52cbf4e2f4abe827064783ea52bfa05c SHA-1: ff10d869dd5bae1ea22112aaae495bf4b0f7373c SHA-256: 3b33cea3c0a9ba09420544ad82176218c694bda97bb75dd0995f6463e3a7f323
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=kpss+kaynak+ar%2525C5%25259Fivi+2019'. This URL is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains text related to 'Kpss kaynak ar_ivi 2019' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=kpss+kaynak+ar%2525C5%25259Fivi+2019
    • https://static.usrfiles.com/ugd/b8c837_72352d5fda344b42a69c506199c407bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec67cc3a1201451396d892e0c2da5cc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7298ab926a744f9c8e592a741980f1eb.pdf
    • https://static.usrfiles.com/ugd/2c8d66_8013c5daf4c545ca91ba86e6ca402fd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa498cbccd3f411cb42edd933d93e5fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce980da358dc4df8a36479e9eed292b7.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/xavikixidaju.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/gta_v_100_save_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/20952603490.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/capability_approach_sen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/keputokubuzavovubod.pdf
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/ap_grama_sachivalayam_jobs_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/advantages_and_disadvantages_of_modern_technology_essay.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/harry_potter_in_hindi_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ed5.bin
0f817a1b463b9716fdb7e0d862d9d460bb39a737dd164e03723c885da40b8b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED5 5708 bytes
font_01_sfnt_off000061d8.bin
6d283b0d15c16eb52d973b7458812f8405633b29ce4c9be4ba337faa4505dd01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 11724 bytes

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